Footwear sole



FIG. 1 is a bottom perspective view of a footwear sole showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevation thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a front elevation thereof; and,

FIG. 6 is a rear elevation thereof.

The broken line showing a footwear upper throughout the views, illustrates the portion of the design that forms no part of the claim. 

I claim the ornamental design for a footwear sole, as shown and described. 